General DiscussionHow the heck do you play Naga?!

get radiance

farm

win

Radiance build:
Go mid (or safelane). I like to start with a Wraith band plus 1x tango and 2x gg branches. Get a bottle, Aquila, brown boots and a tp. Farm the lane and stack/farm the jungle if radiant. Bottlecrow all the time to keep your nuke going, don't waste time on runes unless the lane is pushed or you have supports camping them. If you feel insecure and think that you'll get ganked a lot and need survivability you can grab drums before radiance.
When rotations start keep farming/split pushing. If the enemy mid leaves the lane, push the tower (use illusions to clear/pull creepwaves while you hit the tower). If they gank you or they try to put pressure on mid, tp to another lane and keep farming and try to trade towers. By lvl 7 your illusions are still weak, but they are capable of clearing a mid camp if you use your nuke. Take advantage of this (don't forget to bottlecrow!!).
Unless you had a really hard time early game, you should have your radiance around 17 mins in. Now your illusions get stronger and they can clear one camp each if you use your nuke. If the lanes are pushed out past the river, you send one illusion to the two closest lanes while the other clears a jungle camp and you clear another. If the creeps are on your side of the river you send each illusion to a jungle camp while you clear the lane creepwave. You should do this every time your Q is off cooldown (but watch that mana pool, you have to save mana at least for song + tp in case of 2+ man gank - don't forget to bottlecrow!!).
If your team can handle fights without feeding too much, get bots next. If your team is struggling andd they really need you, get Manta Style and engage only when needed (e.g. to def a t2), but keep farming everytime you can.
Your next item should be heart or butterfly. Both will make your illusions very hard to kill, but one can be more helpful than the other depending on the enemy lineup.

Diffusal build:
You go for this build when:
>Your team is feeding like crazy and you need to 5 man to stop it.
>You have a really bad early game (bad farm/lots of deaths).
>Enemy team has better early-mid game and they're taking advantage of it by putting pressure on you or your sidelanes and you need to come online ASAP.
>You already have a supergreedy lategame carry in your team who can't do shit early game.

Same starting items and early strat, but instead of getting a Radiance you get a Diffusal blade (cheaper parts and overall). You won't farm as fast, you won't zone out the enemy supports with DoT, you won't push as hard, but you will have impact in fights much earlier than with radiance. Since you won't be able to split push that fast, get PTs instead of Bots and join your team in fights that you think you can win (with the radiance build you pve until you get your third big item).